354290779821 has 16 divisors (see below), whose sum is σ = 517233650688. Its totient is φ = 213929348400.

The previous prime is 354290779813. The next prime is 354290779837. The reversal of 354290779821 is 128977092453.

It is a happy number.

It is not a de Polignac number, because 354290779821 - 2³ = 354290779813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354290779811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19799331 + ... + 19817216.

It is an arithmetic number, because the mean of its divisors is an integer number (32327103168).

Almost surely, 2^354290779821 is an apocalyptic number.

It is an amenable number.

354290779821 is a deficient number, since it is larger than the sum of its proper divisors (162942870867).

354290779821 is a wasteful number, since it uses less digits than its factorization.

354290779821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39616832.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 354290779821 in words is "three hundred fifty-four billion, two hundred ninety million, seven hundred seventy-nine thousand, eight hundred twenty-one".